JP4879302B2 - Residual sealant remover used for repairing sealant filled in joint groove of building outer wall - Google Patents

Description

The present invention relates to the removal agent of residual sealant used in the renovation how the filled eye Graben building exterior wall sealant.

  When the sealing material filled in the joint groove of the outer wall of the building is cut with a cutter or the like, a thin layer of the sealing material remains on the inner surface of the joint groove.

  In Patent Document 1, a gasket is embedded in a joint groove having a thin layer of the above-described residual sealing material, and an organic acid in the form of a cream or paste is filled in the joint groove. By masking the opening surface of the ditches and sealing the organic acid, the thin layer of the sealing material remaining on the inner surface of the joint groove is promoted to be dissolved, and then the gasket is pulled out from the joint groove to be dissolved. Disclosed is a method for repairing a joint in an outer wall of a building, in which a thin layer of residual sealing material is removed and a new sealing material is filled in a joint groove from which the thin layer of residual sealing material has been removed.

Japanese Patent No. 3389175

  Thus, in the refurbishing method using the organic acid to remove the thin layer of the residual sealing material, a part of the residual sealing material may further remain in the countless minute recesses on the inner surface of the joint groove. The residual sealing material is interposed between the refilled new sealing material and the joint groove inner surface, and there is a problem of impairing the sealing effect of the new sealing material.

  In other words, the organic acid used in the above conventional example does not sufficiently act on the adhesive surface between the thin layer of the residual sealing material and the inner surface of the joint groove, and has a sufficient effect of floating the thin layer of the residual sealing material from the inner surface of the joint groove. I cannot expect it.

  Therefore, even after the thin layer is scraped off with a spatula or the like, the thin layer may remain on the inner surface of the joint groove, particularly on the concave portion of the inner surface.

  In addition, it is necessary to prepare a gasket for drawing out a thin layer of the dissolved residual sealing material together with an organic acid. As a result, the operation is complicated as a whole, and a process and a work period are required.

The present invention provides a clearing agent of residual sealant used in the renovation how the sealing material to solve the above problems.

  The removal agent for the residual sealant used in the above-described method for repairing the sealant is formed by adding metal soap to a solvent containing limonene and menthane or / and a hydrocarbon which is a petroleum fraction, and thickening.

To restate,
1: 1-methyl-4-isopropenyl-1-cyclohexene (limonene) having a basic skeleton of a monocyclic monoterpene,
2: 1-isopropyl-4-methylcyclohexane (menthane),
3: Hydrocarbons that are petroleum fractions,
Used for repairing the sealing material filled in the joint groove of the outer wall of the building which is made by adding metal soap to the solvent containing 1 and 2, or 1 and 3, or 1 and 2 and 3 It is a remover for residual sealant.

  This removal agent can maintain the applied state for a predetermined time without evaporating from the thin layer of the sealing material remaining on the inner surface of the joint groove due to the thickening, and can surely promote the softening and swelling of the residual thin layer.

  According to the present invention, the thin layer of the sealing material remaining on the inner surface of the joint groove after the sealing material is cut out from the joint groove with a cutter or the like is softened and swollen, thereby weakening the bonding force with the inner surface of the joint groove and ensuring Can be removed.

  As a result, the active base material surface of the outer wall is reproduced, a good adhesion between the inner surface of the joint groove and the new sealing material filled in the joint groove is obtained, and a sound sealing effect is obtained.

  In addition, it is possible to simplify the repair work of the sealing material filled in the joint groove of the outer wall of the building, shorten the construction period, and reduce the construction cost.

FIG. 1 to FIG. 6 show the method of repairing the sealing material filled in the joint groove of the building outer wall according to the present invention in the order of steps, and FIG. 1 is a cross-sectional view showing a state where the old sealing material is filled in the joint groove. Sectional drawing which shows the thin layer of the sealing material which remains in the joint groove inner surface after excising the old sealing material of FIG. 1 with a cutter etc. FIG. Sectional drawing which shows the state which apply | coated the solvent which uses the limonene or limonene component which became viscous to the thin layer of the residual sealing material of FIG. Sectional drawing which shows the softening swelling state of the thin layer of the residual sealing material which apply | coated the solvent which uses the thickened limonene or limonene as a component of FIG. Sectional drawing which shows the state which removed the thin layer of the residual sealing material softened and swollen of FIG. FIG. 6 is a cross-sectional view illustrating a state in which a new sealing material is filled after the thin layer of the residual sealing material in FIG. 5 is removed. The expanded sectional view which shows typically the state which the thin layer of the residual sealing material in FIG. 4 softened and swelled and floated from the joint groove inner surface.

Hereinafter, embodiments for carrying out the present invention will be described with reference to FIGS.
The removal agent of the residual sealing material used in the method for repairing the sealing material according to the present invention has limonene (extracted from citrus fruits such as orange oil) having a high cleaning effect as the main component of the removal agent, and has not been considered as a removal agent so far. It is an epoch-making remover that has been successfully thickened.

  The above remover is prepared by adding a metal soap typified by aluminum distearate, aluminum dioctate, or aluminum monooctate to a solvent containing limonene and menthane or / and a hydrocarbon that is a petroleum fraction. It is characterized by being thickened.

  Limonene is a monocyclic monoterpenoid having a chemical formula of C10H16 and a molecular weight of 136.23. Naturally d-form (chemical name is (R) -1-methyl-4- (1-methylethenyl) cyclohexene) cyclohexene), l-form (chemical name is (S) -1-methyl-4- (1-methylethenyl) Cyclohexene) and d / l form (chemical name is 1-methyl-4- (1-methylethenyl) cyclohexene).

  In the present invention, these are generically called limonene, and the generic chemical name is 1-methyl-4-isopropenyl-1-cyclohexene.

  Menthane is a kind of terpene, an organic compound that exists naturally in essential oils, is a colorless liquid, and has a fennel-like fragrance. The p-menthane skeleton is the host of many terpenes. p-Mentan is obtained from essential oils such as the fruits of Globus eucalyptus.

  Industrially, it is synthesized by hydrogenating limonene, terpineol, cymene and the like, and the chemical name of these p-menthanes is 1-isopropyl-4-methylcyclohexane.

  Examples of the removal agent for the residual sealing material used in the method for repairing the sealing material filled in the joint groove of the outer wall of the building are as follows.

(1) Solvent based on 1-methyl-4-isopropenyl-1-cyclohexene:
35.0 parts by mass (2) menthane (1-isopropyl-4-methylcyclohexane):
45.0 parts by mass (3) Aliphatic alicyclic hydrocarbon hybrid:
20.0 parts by mass (4) Above (1), (2), (3) 100 parts by mass,
2.7 parts by mass of metal soap (thickening agent)

(1) Solvent based on 1-methyl-4-isopropenyl-1-cyclohexene:
40.0 parts by mass (2) menthane (1-isopropyl-4-methylcyclohexane):
35.0 parts by weight (3) Aliphatic alicyclic hydrocarbon mixture:
25.0 parts by mass (4) For the above (1), (2), (3) 100 parts by mass,
0.7 parts by weight of metal soap (thickening agent)

(1) Solvent based on 1-methyl-4-isopropenyl-1-cyclohexene:
90.0 parts by mass (2) Aliphatic alicyclic hydrocarbon hybrid:
10.0 parts by mass (3) For the above (1) and (2) 100 parts by mass,
5.7 parts by mass of metal soap (thickening agent)

  Summarizing the above Examples 1 to 3, it is shown that each of the above removing agents is made by adding metal soap to a solvent containing hydrocarbons which are limonene and menthane or / and petroleum fraction, and thickening. In this case, the amount of metal soap is 0.7 to 5.7 parts by mass, but it is possible to add up to about 0.3 to 7.0 parts by mass.

To restate,
(1) 1-methyl-4-isopropenyl-1-cyclohexene (limonene) having a basic skeleton of a monocyclic monoterpene,
(2) 1-isopropyl-4-methylcyclohexane (menthane),
(3) hydrocarbons that are petroleum fractions,
Metal soap is added to the solvent containing (1), (2) or (1), (3) or (1), (2), (3) as components, and the mixture is thickened.

Next, an example of a method for repairing a sealing material using the remover will be described.
As shown in FIG. 1, as a repair method when the sealing material 3 filled in the joint groove 2 of the outer wall 1 is deteriorated, first, as shown in FIG. 2, the sealing material 3 is excised with a cutter, a sander or the like. .

  As shown in FIG. 2, when the sealing material 3 is cut with a cutter, a sander or the like, the thin layer 4 of the sealing material 3 remains on the inner surface 6 of the joint groove 2 (adhesive interface of the sealing material 3).

  Conventionally, the sealing material for forming the thin layer 4 of the residual sealing material 3 is dissolved in a solvent and then removed using a physical force such as a cutter or a nylon polishing cloth.

  However, in the above method, when the bonding surface of the sealing material 3 is porous, it is difficult to completely remove the sealing material 3, and the sealing material 3 remains in a minute recess in the joint groove inner surface 6. 2 causes a problem of deteriorating the adhesiveness of the sealing material to be newly filled.

As a method for reliably removing the thin layer 4 of the sealing material 3 remaining on the adhesive surface (joint groove inner surface 6), limonene softens and swells the thin layer 4 of the residual sealing material 3, and the inner surface 6 of the joint groove 2. It has been found that there is an effect of weakening the bonding force, that is, to float the thin layer 4 from the inner surface 6, and has come up with the residual sealant remover according to the present invention.

  That is, as shown in FIG. 3, limonene exemplified in Examples 1 to 3 or a solvent 5 containing limonene as a component is applied to the thin layer 4 of the sealing material 3 remaining on the joint groove inner surface 6.

  As shown in FIG. 4, when the limonene or the solvent 5 containing limonene is applied and left for 30 to 180 minutes, the thin layer 4 of the residual sealing material 3 is softened and swelled, as shown in FIG. In addition, the softening swelling causes softening swelling from the joint groove inner surface 6 to form a floating state.

  As shown in FIG. 5, after waiting for the softening swelling time (standing time) of the solvent, the thin layer 4 of the residual sealing material 3 in the softening swelling state is removed by skinning or the like.

  Preferably, it is desirable to remove the residual sealing material 3 in a softened and swollen state within 30 minutes to 120 minutes.

  After application of the solvent, the softening and swelling are insufficient until 30 minutes, and after 180 minutes or more, the solvent evaporates and hardens to return to the state before swelling.

  The thin layer 4 of the sealing material 3 remaining on the joint groove inner surface 6 is eliminated or weakened due to the softening and swelling, and can be removed almost completely by the above-described skin piling. The situation in which the residual sealing material 3 remains in the minute recesses of the joint groove inner surface 6 can be prevented as much as possible.

  Therefore, the joint groove inner surface 6 that does not substantially adversely affect the adhesion of the new sealing material 7 to the joint groove inner surface 6 is reproduced. That is, the active base material surface 6 of the outer wall 1 is exposed.

  As shown in FIG. 6, a new sealing material 7 is filled in the joint groove 2 from which the thin layer 4 of the residual sealing material 3 has been removed, and the new sealing material 7 (for example, a silicone-based sealing material or a modified silicone-based sealing). Material or the like) is firmly adhered to the active base material surface (inner surface of joint groove) 6 of the outer wall 1.

  In the above repair method, it is not necessary to close the opening surface of the joint groove 2 conventionally performed after the application of the solvent with a masking tape.

  When the limonene or the solvent 5 containing limonene is not viscous, it flows immediately even if it is applied to the inner surface of the outer wall joint groove 2, and its dissolution effect cannot be obtained.

  On the other hand, since limonene is a medium extracted from citrus fruits such as orange, it has the advantage of being an environmentally friendly remover.

  Thus, as a countermeasure against the above-mentioned odors of limonene, a chemical structure similar to limonene with reduced limonene odor (hereinafter referred to as odorless limonene) was selected and its effect was confirmed, but depending on the type of odorless limonene, its effect Is different.

  On the other hand, in order to maintain the limonene or the solvent 5 containing limonene as a non-sag so that it can be held without flowing on the inner surface 6 of the vertical or horizontal joint groove, the thickening of the limonene or the solvent 5 containing limonene is started. The limonene or the thickening solvent containing limonene as described in Examples 1 to 3 which is applied to the joint groove inner surface 6 and exhibits its function without regret, is used as a solvent in the repair method. It was.

  That is, in general, no attempt is made to thicken limonene or a detergent containing limonene (thickening that can maintain the state of application of the residual sealing material 3 to the thin layer 4), The purpose of removing the thin layer 4 of the residual sealing material 3 was effectively achieved by thickening the limonene or the solvent 5 containing limonene as a component.

  Furthermore, the repair work of the sealing material 3 filled in the joint groove 2 of the building outer wall 1 is a huge amount of work, and the repair work of the sealing material of this kind of outer wall joint is drastically improved by using the above-mentioned environment-friendly limonene. And can contribute to environmental improvement.

  The removal agent for the residual sealing material 3 used in the above-described method for repairing the sealing material will be described again. (1) The main component is 1-methyl-4isopropenyl-1-cyclohexene having a basic skeleton of a monocyclic monoterpene. A colorless transparent liquid (boiling range 175 to 179 ° C.), (2) chemically synthesized menthane: 1-isopropyl-4-methylcyclohexane (boiling range 167 to 170 ° C.), and (3) petroleum fraction. A low odor, low aromatic hydrocarbon, a mixture of three solvents, a mixture of aliphatic and alicyclic hydrocarbons (boiling range: 163 to 190 ° C.), containing at least 8 hydrocarbon atoms in the molecular formula It is a remover for a residual sealant made of a viscous material formed by adding aluminum soap, which is a non-alkali metal salt of a fatty acid.

  The solvent may be a combination of the above (1) and (2) or a combination of the above (1) and (3), but the three combinations (1), (2) and (3) are most preferable.

  Theoretically, there are three types of aluminum soaps, monosoap, disoap and trisoap, which are preferable because monosoap and disoap are most easily generated.

  The names of mono soap, di soap, tri soap, which are commercially available products, do not mean chemical compounds, but often indicate the ratio of aluminum and fatty acid used in the manufacture of soap.

  Here, the aluminum soap having the largest amount of components of aluminum and fatty acids in mono, di and trisoaps is referred to as monosoap, disoap and trisoap. Monosoap and disoap differ significantly in their dissolution behavior in organic solvents. Disorp readily disperses in hydrocarbons and forms a gel, while monosoap has low solubility in hydrocarbons.

  Dissolve of the soap is good in the solvent of (1), and poor in solubility of (2) and (3).

  Similarly, the greater the number of hydrocarbons in the fatty acid, the better the solubility of disoap in the solvent (1) and the lower the solubility in (2) and (3).

  Here, the use range of the solvent 1-methyl-4-isopropenyl-1-cyclohexene of (1) is preferably 20 to 50% by mass, and most preferably 25 to 35% by mass. The aliphatic and alicyclic hydrocarbon hybrid is preferably 15 to 30% by mass, preferably 20 to 25% by mass, in such a ratio that the aluminum soap is dispersed and the plasticizer contained in the remaining sealing material can be dissolved. Is most preferred.

  The solvent mentane is a solvent having an intermediate function between the solvent (1) and the solvent (3), and is a combined amount of 30 to 60% by mass, preferably 40 to 50% by mass. However, the solvent (1) has the best swelling property of the remaining sealing material, and the solvent (2) and the solvent (3) are inferior in swelling property.

  Since the gel body of aluminum soap needs to be viscous enough not to be solidified (jelly-like), the use of a monosoap or disoap of a fatty acid having 8 carbon atoms and a fatty acid having 18 carbon atoms A viscous gel body can be obtained, but even if it has 12 or 16 carbon atoms, it can be used because it is viscous.

  DESCRIPTION OF SYMBOLS 1 ... Building outer wall, 2 ... Joint groove, 3 ... Sealing material, 4 ... Thin layer of residual sealing material, 5 ... Limonene or the solvent which uses limonene as a component, 6 ... Joint groove inner surface, 7 ... New sealing material.

Claims (2)

Residue used in the method of repairing the sealing material filled in the joint groove of the outer wall of the building, which is made by adding metal soap to the solvent containing limonene and menthane and / or petroleum fraction hydrocarbon. Sealant remover. The odorless limonene is used as the solvent, and the removing agent for the residual sealing material used in the method for repairing the sealing material filled in the joint groove of the building outer wall according to claim 1.

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